- From: RUELLAN Herve <Herve.Ruellan@crf.canon.fr>
- Date: Thu, 17 Jan 2013 16:50:58 +0000
- To: James M Snell <jasnell@gmail.com>, "ietf-http-wg@w3.org" <ietf-http-wg@w3.org>
James, > -----Original Message----- > From: James M Snell [mailto:jasnell@gmail.com] > Sent: mercredi 16 janvier 2013 23:07 > To: ietf-http-wg@w3.org > Subject: bohe and delta experimentation... > > After going a number of scenarios with bohe using a variety of stream- > compression scenarios it's painfully obvious that there is really no way > around the CRIME issue when using stream-compression. So with that, I'm > turning my attention to the use of Roberto's delta encoding and exploring > whether or not binary optimized values can make a significant difference (as > opposed to simply dropping in huffman-encoded text everywhere). > > > I'm starting with dates first... > From our dataset (see [1]), about 20% of the response headers are dates. The second type of values to optimize would be integer, that correspond to roughly 15% of the response headers. One caveat: sometimes the value of a header that should be a date is not a date. Therefore an escape mechanism must be provided to encode these values. Another interesting thing to investigate is encoding a value relatively to a previous value, as was proposed by Willy Tarreau. This is especially efficient for URLs. Hervé. [1] http://www.ietf.org/proceedings/85/slides/slides-85-httpbis-1.pdf
Received on Thursday, 17 January 2013 16:51:28 UTC